| Arformoterol Action Pathway |  | Drug Action | ATP / Arformoterol / Potassium cation / Calcium / Magnesium cation / Cyclic adenosine monophosphate |
| Argatroban Action Pathway |  | Drug Action | Argatroban / Calcium |
| Argatroban. |  | Drug Action | Argatroban / Phylloquinone / Calcium |
| Arginine and Proline Metabolism |  | Metabolic | Pyridoxal phosphate / Ademetionine / Arginine / Aspartic acid / Ornithine / Adenosine phosphate / Succinic acid / Glutamic acid / Glycine / Creatine / Citrulline / NADH / ATP / Proline / Sapropterin / Nitric Oxide / Mesoheme / Glycocyamine / 3,4-Dihydro-2h-Pyrrolium-5-Carboxylate / Oxogluric acid / N(5)-[(hydroxyamino)(imino)methyl]-L-ornithine / Flavin adenine dinucleotide / Flavin mononucleotide / Urea / Pyrophosphoric acid / Maleic acid / 4-Carboxy-4-Aminobutanal |
| Arginine: Glycine Amidinotransferase Deficiency (AGAT Deficiency) |  | Disease | Pyridoxal phosphate / Ademetionine / Arginine / Aspartic acid / Ornithine / Adenosine phosphate / Succinic acid / Glutamic acid / Glycine / Creatine / Citrulline / NADH / ATP / Proline / Sapropterin / Nitric Oxide / Mesoheme / Glycocyamine / 3,4-Dihydro-2h-Pyrrolium-5-Carboxylate / Oxogluric acid / N(5)-[(hydroxyamino)(imino)methyl]-L-ornithine / Flavin adenine dinucleotide / Flavin mononucleotide / Urea / Pyrophosphoric acid / Maleic acid / 4-Carboxy-4-Aminobutanal |
| Arginine: Glycine Amidinotransferase Deficiency (AGAT Deficiency) |  | Disease | Pyridoxal phosphate / Ademetionine / Arginine / Aspartic acid / Ornithine / Adenosine phosphate / Succinic acid / Glutamic acid / Glycine / Creatine / Citrulline / NADH / ATP / Proline / Sapropterin / Nitric Oxide / Mesoheme / Glycocyamine / 3,4-Dihydro-2h-Pyrrolium-5-Carboxylate / Oxogluric acid / N(5)-[(hydroxyamino)(imino)methyl]-L-ornithine / Flavin adenine dinucleotide / Flavin mononucleotide / Urea / Pyrophosphoric acid / Maleic acid / 4-Carboxy-4-Aminobutanal |
| Argininemia |  | Disease | Pyridoxal phosphate / Pyruvic acid / Arginine / Aspartic acid / Ornithine / L-Glutamine / Adenosine phosphate / Glutamic acid / Citrulline / NADH / Alanine / ATP / Calcium / Oxogluric acid / Urea / Pyrophosphoric acid / Maleic acid |
| Argininemia |  | Disease | Pyridoxal phosphate / Pyruvic acid / Arginine / Aspartic acid / Ornithine / L-Glutamine / Adenosine phosphate / Glutamic acid / Citrulline / NADH / Alanine / ATP / Calcium / Oxogluric acid / Urea / Pyrophosphoric acid / Maleic acid |
| Argininosuccinic Aciduria |  | Disease | Pyridoxal phosphate / Pyruvic acid / Arginine / Aspartic acid / Ornithine / L-Glutamine / Adenosine phosphate / Glutamic acid / Citrulline / NADH / Alanine / ATP / Calcium / Oxogluric acid / Urea / Pyrophosphoric acid / Maleic acid |
| Argininosuccinic Aciduria |  | Disease | Pyridoxal phosphate / Pyruvic acid / Arginine / Aspartic acid / Ornithine / L-Glutamine / Adenosine phosphate / Glutamic acid / Citrulline / NADH / Alanine / ATP / Calcium / Oxogluric acid / Urea / Pyrophosphoric acid / Maleic acid |
| Aripiprazole Dopamine agonist Action Pathway |  | Drug Action | Pyridoxal phosphate / Tyrosine / Sapropterin / Dopamine / Levodopa / Aripiprazole / Calcium / Iron |
| Aripiprazole lauroxil H1 Antihistamine Smooth Muscle Relaxation Action Pathway |  | Drug Action | Aripiprazole / Calcium / Magnesium cation / Aripiprazole lauroxil |
| Aripiprazole lauroxil H1-Antihistamine Blood Vessel Constriction Action Pathway |  | Drug Action | Arginine / Citrulline / Sapropterin / Nitric Oxide / Calcium / Magnesium cation / Mesoheme / Flavin adenine dinucleotide / Flavin mononucleotide / Aripiprazole lauroxil |
| Aripiprazole lauroxil H1-Antihistamine Immune Response Action Pathway |  | Drug Action | Aripiprazole / Calcium / Aripiprazole lauroxil |
| Aripiprazole Serotonin Agonist Action Pathway |  | Drug Action | Pyridoxal phosphate / Tryptophan / Sapropterin / Aripiprazole / Calcium / Iron / Oxitriptan |
| Aromatase Deficiency |  | Disease | NADH / Testosterone / Estrone / Estradiol / Calcium / Androstenedione / Formic acid / Mesoheme / Uridine-5'-Diphosphate / Estrone sulfate / Prasterone sulfate / 5beta-dihydrotestosterone |
| Aromatase Deficiency |  | Disease | NADH / Testosterone / Estrone / Estradiol / Calcium / Androstenedione / Formic acid / Mesoheme / Uridine-5'-Diphosphate / Estrone sulfate / Prasterone sulfate / 5beta-dihydrotestosterone |
| Aromatic L-Aminoacid Decarboxylase Deficiency |  | Disease | Pyridoxal phosphate / Ademetionine / Ascorbic acid / Tyrosine / Norepinephrine / Epinephrine / Dopamine / Levodopa / Iron / Pyrroloquinoline Quinone |
| Aromatic L-Aminoacid Decarboxylase Deficiency |  | Disease | Pyridoxal phosphate / Ademetionine / Ascorbic acid / Tyrosine / Norepinephrine / Epinephrine / Dopamine / Levodopa / Iron / Pyrroloquinoline Quinone |
| Arsenate Detoxification |  | Metabolic | Ademetionine / Glutathione / Dimethylarsinate |
| Artemether Action Pathway (New) |  | Drug Action | NADH / Mesoheme / Uridine-5'-Diphosphate / Formaldehyde / Artemether |
| Artemether Metabolism Pathway |  | Drug Metabolism | NADH / Mesoheme / Uridine-5'-Diphosphate / Formaldehyde / Artemether |
| Artemotil Drug Metabolism |  | Metabolic | Artemotil |
| Artenimol Action Pathway |  | Drug Action | ATP / Calcium / Mesoheme / Artenimol |
| Artesunate Action Pathway |  | Drug Action | NADH / Mesoheme / Uridine-5'-Diphosphate / Formaldehyde / Artesunate |